5-6
SAMA5D3x-EK User Guide
11180A–ATARM–30-Jan-13
5.2.4
Boot Options
The following table lists all the supported boot options.
5.2.4.1
Boot Configuration
In order to use SAM-BA
®
boot, the NAND flash and SPI data flash must be deselected.
The pushbutton PB4 (CS boot disable) in association with the PB RST allows to disable these compo-
nents during the reset and access to the ROMBoot.
5.3
Functional Blocks
5.3.1
Processor
The CM board is equipped with an Atmel ARM-based embedded MPU, as listed below, in a BGA324-ball
BGA package.
The four devices share an identical footprint. All four share the CM board PCB with minor configuration
differences.
The four devices are:
SAMA5D31
SAMA5D33
SAMA5D34
SAMA5D35
.As different interfaces can be defined using the same pins, it depends on the actual configuration of the
CPU as to which function(s) are in fact available to the Evaluation Kit board.
The Atmel SAMA5D3 series is a high-performance, power-efficient embedded MPU based on the ARM
®
Cortex
™
-A5 processor, achieving 536 MHz with power consumption levels below 0.5 mW in low-power mode.
The device features a floating point unit for high-precision computing and accelerated data processing, and a
high data bandwidth architecture. It integrates advanced user interface and connectivity peripherals and
security features.
The SAMA5D3 series features an internal multi-layer bus architecture associated with 39 DMA channels to
sustain the high bandwidth required by the processor and the high-speed peripherals. The device offers
support for DDR2/LPDDR/LPDDR2 and MLC NAND Flash memory with 24-bit ECC.
The comprehensive peripheral set includes an LCD controller with overlays for hardware-accelerated image
composition, a touchscreen interface and a CMOS sensor interface. Connectivity peripherals include Gigabit
EMAC with IEEE1588, 10/100 EMAC, multiple CAN, UART, SPI and I2C. With its secure boot mechanism,
Table 5-3. Boot Options
Boot Mode
Boot Device
Type Note
BMS OPEN
Embedded ROM Boot
ROM Boot
- SPI0, NPCS0
- SD/MMC MCI0, MCI1
- NAND Flash
- SPI0, NPCS1
- TWI0
Default boot on
embedded ROM
BMS CLOSE
NOR Flash
On-board NOR Flash
using NCS0
Boot on external NOR
Flash memory
electronic components distributor
